[1] Univ Coll Dublin, UCD Sch Med, Dept Gen Practice, Dublin, Ireland
[2] Univ Livingstonia, Fac Appl Sci, Publ Hlth Dept, Ekwendeni, Malawi
[3] Mzuzu Univ, Fac Sci, Biol Sci Dept, Technol & Innovat, Mzuzu, Malawi
[4] Trinity Coll Dublin, Sch Med, Dept Pharmacol, Dublin, Ireland
[5] St James Hosp, Dept Pharmacol, Dublin, Ireland
[6] St James Hosp, HRB Clin Res Facil, Dublin, Ireland